Image Forming System for Wax-Toner Adhesive Bonding
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Solution Overview
Problem
The issue of unintended peeling between toner images and adhesive layers on folded recording media, leading to image defects, arises due to reduced adhesive properties caused by parting agents in the toner, particularly when the adhesive layers are formed after image formation.
Innovation Solution
An image forming system that forms toner images using wax-containing toner on both surfaces of a recording medium, followed by folding and pressure-bonding using an adhesive medium, with controlled image formation order to manage toner deposition and adhesive application, ensuring stronger bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive layers are formed after image formation, then the image forming process is simplified, but the adhesive property between toner image and adhesive layer deteriorates due to parting agents in toner
Solution Approach 1:
The patent applies preliminary action by forming the adhesive layer before the toner image on the recording medium. This sequence allows the adhesive layer to be in place before toner deposition, enabling the adhesive to bond properly with the recording medium surface without being interfered by parting agents in the toner. The control unit then determines the image formation order to ensure proper bonding while maintaining process simplicity.
2Ease of manufacture
If toner containing wax is used, then the toner image can be formed, but the adhesive property between toner image and adhesive layer lowers due to parting agent
Solution Approach 1:
The adhesive layer is formed preliminarily before toner image deposition. This ensures that the adhesive is already in place on the recording medium surface, allowing it to bond strongly to the medium before the toner (with its parting agents) is applied. The control unit manages the formation order to maintain adhesive strength while enabling toner image formation.
Solution Approach 2:
The patent changes the sequence parameter of the formation process, reversing the conventional order by forming the adhesive layer before the toner image. This parameter change in process sequence resolves the conflict between using wax-containing toner for image formation and maintaining adhesive property, as the adhesive is applied to the clean recording medium surface before toner deposition.
3Reliability
If unintended peeling occurs between adhesive contact and toner image layer, then the bonding process is compromised, but image defects occur after peeling
Solution Approach 1:
By forming the adhesive layer preliminarily before toner image deposition, the patent ensures that the adhesive bonds to the recording medium surface before the toner is applied. This prevents unintended peeling during subsequent processing, as the adhesive- toner interface is established after the adhesive has already bonded to the medium, maintaining both bonding reliability and image quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach suppresses image defects by enhancing the adhesive properties between toner images and adhesive layers, maintaining the integrity of the printed image during peeling.
Implementation Method 1
a pressure-bonding unit configured to pressure bond the recording medium folded in two by applying heat and pressure to the recording medium
Implementation Method 2
a pressure-bonding unit configured to pressure bond the recording medium folded in two by applying heat and pressure to the recording medium
Implementation Method 3
one of the first surface and second surface being an inner surface of the recording medium folded in two, the pressure-bonding unit pressure-bonding the recording medium folded in two via an adhesive member
Data Source
AI summary
An image forming system includes an image forming unit for forming a first toner image and a second toner image on a first surface and a second surface of a recording medium by using toner containing wax; a pressure-bonding unit for pressure-bonding the recording medium folded in two by applying heat and pressure to the recording medium, an inner surface of the recording medium folded in two being pressure-bonded via an adhesive medium, one of the first surface and the second surface being the inner surface of the recording medium folded in two, the pressure-bonding unit pressure-bonding the recording medium folded in two via an adhesive member; and a control unit for determining an image forming order so that an image is formed on an outer surface of the recording medium folded in two, and then on the inner surface of the recording medium folded in two.